something drunk people say when they want people to THINK they are sober; when in reality they are sooo drunk they are walking like they have no backbone. they more the phrase is repeated the more drunk they are.

louie: "how many shots did you have?!"
ruthy: "1"
louie: "it looks like you had 20. are you going to be ok ruthy?"
ruthy: "IM STRAIGHT im straight"